We divide 745584 by 21
We're looking to find how many times 21 goes into 745584.

On to step 1:
7 divided by 21 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 21

Going ahead to step 2:
The number 21 fits into 74 3 times, leaving a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 11 after subtracting 63 from 74.
Bring next digit (5) of the dividend behind the 11 and repeat the process: 115 / 21

Going ahead to step 3:
If we divide 115 by 21, we get 5 and a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 35.0
Subtract 105 from 115 to get 10.
Grab the next digit (5) from the dividend, add it to 10, then carry on: 105 / 21

Going ahead to step 4:
When dividing 105 by 21, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 355.0
Deduct 105 from 105 and we're left with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 21

Step 5:
If we divide 8 by 21, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 3550.0
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 21

Let's proceed to step 6:
21 can be fit into 84 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 35504.0
Subtracting 84 from 84 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 35504.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
21 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 35504.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 35504.0 with a remaining 0.0.